CO2 turned into a nitrogen doped carbon catalyst for fuel cells and metal-air battery applications

被引：29

作者：

Ratso, Sander ^{[1
]}

Walke, Peter Robert ^{[2
]}

Mikli, Valdek ^{[2
]}

Locs, Janis ^{[3
]}

Smits, Krisjanis ^{[4
]}

Vitola, Virginija ^{[4
]}

Sutka, Andris ^{[5
]}

Kruusenberg, Ivar ^{[1
]}

机构：

[1] NICPB, Akad Tee 23, EE-12618 Tallinn, Estonia

[2] Tallinn Univ Technol, Dept Mat & Environm Technol, Ehitajate Tee 5, EE-19086 Tallinn, Estonia

[3] Riga Tech Univ, Rudolfs Cimdins Riga Biomat Innovat & Dev Ctr RTU, Inst Gen Chem Engn, Fac Mat Sci & Appl Chem, Pulka 3, LV-1007 Riga, Latvia

[4] Univ Latvia, Inst Solid State Phys, LV-1063 Riga, Latvia

[5] Riga Tech Univ, Fac Mat Sci & Appl Chem, Res Lab Funct Mat Technol, Paula Valdena 3-7, LV-1048 Riga, Latvia

来源：

GREEN CHEMISTRY | 2021年 / 23卷 / 12期

关键词：

OXYGEN REDUCTION REACTION; CARBIDE-DERIVED CARBON; N-C CATALYSTS; ACTIVE-SITES; CATHODE CATALYSTS; MOLTEN-SALT; ELECTROCATALYSTS; ELECTROLYSIS; IRON; STABILITY;

D O I：

10.1039/d1gc00659b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Heteroatom doped metal-free catalysts are one of the most promising replacements for platinum for the alkaline oxygen reduction reaction (ORR). Due to the lack of metal atoms, they are extremely stable and environmentally friendly. However, production of carbon nanomaterials can have a very high CO2 footprint. In this study, we present ORR catalysts made directly from CO(2)via molten salt CO2 electrolysis. The deposited carbon powder is doped with nitrogen using pyrolysis in the presence of dicyandiamide. The effect of molten carbonate electrolyte composition towards the final ORR activity in 0.1 M KOH is studied. A thorough physico-chemical study of the starting carbons and N-doped catalysts is presented with SEM and TEM imaging, BET analysis, Raman and X-ray photoelectron spectroscopy as well as the rotating disk electrode method. The onset potential and half-wave potential of the better catalyst were -50 and -175 mV vs. SCE in 0.1 M KOH, respectively.

引用

页码：4435 / 4445

页数：11

共 70 条

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